1 MW solar plant cost: ₹4.0–5.0 crore, engineered honestly
A 1 MW rooftop system in India runs ₹4.0–5.0 crore turnkey (₹40,000–50,000/kW) as of 2026 — best suited to facilities with ₹10 lakh+/month electricity bills. Here's what that buys, what it generates, and the engineering that changes at this size.
15+ years · 535+ projects · Approvals in-house · ISO 9001:2015
1 MW plant — the working numbers
| Indicative turnkey cost | ₹4.0–5.0 crore |
| Per-kW benchmark | ₹40,000–50,000 |
| Roof required | ~1,00,000 sq.ft (≈1 acre of roof) |
| Generation (monthly avg.) | ~1.2 lakh units |
| Generation (annual) | ~14.4 lakh units |
| Bill offset potential | ~₹10–11 lakh/month at ₹9/unit |
| Indicative payback | 3.5–4.5 years |
Indicative North-India figures at ~120 units/kW/month — seasonal variation (including the winter fog dip) is real and belongs in any honest model.
Cost split of a turnkey 1 MW system
| Solar modules (ALMM Tier-1) | 50–58% |
| Inverters & monitoring | 9–12% |
| Mounting structure | 8–11% |
| Cabling, protection & BOS | 10–13% |
| Installation, T&C | 7–10% |
| Approvals, metering & misc. | 2–4% |
A quote materially below the band usually removes scope — structure gauge, protection, or approval liability — rather than adding efficiency. Compare BOQs line by line, or send us one to counter-check.
The engineering story at this size
A megawatt on your own roof is a captive power station — and the first size where the honest answer is sometimes 'don't put it all on the roof.' Banking caps, sanctioned-load ratios and roof fragmentation can favour a hybrid: rooftop captive for the daytime base plus open-access supply for the balance. An EPC that only sells rooftop will never tell you that; our open-access guide is public precisely so the comparison happens before capex, not after.
Grid interconnection
HT interconnection with a full protection study; at this scale several states' banking and capacity rules bite, and the rooftop-vs-open-access comparison becomes a board-level question rather than a footnote.
Inverter architecture
Utility-grade string fleets (15–20 × 60 kW class) or central inverters; DC/AC ratio, MPPT granularity across multiple roof orientations, and O&M access decide the choice more than catalogue efficiency.
Approvals
DISCOM net-metering/captive registration and CEIG approval filed in-house, in parallel with procurement — approvals are our trade, not a subcontracted liaison job.
⚠ Banking & capacity caps
Several DISCOMs cap net-metered or banked energy at 1 MW or at a percentage of sanctioned load — the single biggest determinant of whether full rooftop capacity monetises. State rules first, design second.
⚠ Roof fragmentation
An acre of roof is usually 4–8 blocks with different heights and orientations — DC architecture, walkways and cleaning access must be designed, not improvised.
⚠ O&M is not optional
At 1 MW, a 2% performance loss is ~₹2.5 lakh/year. Monitoring, cleaning regimes and thermography (see our drone-thermography guide) protect the return.
1 MW solar plant — questions we actually get
What does a 1 MW rooftop solar plant cost?
Indicatively ₹4.0–5.0 crore turnkey. At this scale, procurement timing on modules and the HT works scope are the swing factors; per-kW pricing below this band usually signals scope removed, not efficiency added.
1 MW rooftop or open access — which is cheaper?
Rooftop captive avoids wheeling and cross-subsidy charges, so per-unit it usually wins — if your roof, sanctioned load and state rules allow the full megawatt. Where they don't, open access covers the balance. We model both on your bills; the answer is state- and consumer-specific.
How much land-equivalent roof does 1 MW need?
About one lakh sq.ft (~1 acre) of shadow-free roof across your sheds. Ground-mount on spare industrial land is the alternative where roofs fragment badly — see our agrivoltaics/ground-mount guide for when that flips.
What approvals does a 1 MW captive plant need?
DISCOM captive/net-metering registration per state policy, CEIG approval, and synchronisation permission — plus, for some states at this size, additional registration with the state nodal agency. All in-house scope for us; timelines vary by state and we quote them honestly per project.
Other sizes: 100 kW · 500 kW · 1 MW | Full service: Commercial & Industrial Solar EPC
Budgeting a 1 MW plant?
Send your electricity bill and roof details — our estimation team returns an engineered budget with the cost split above filled in for your site, free.
Estimate your facility's solar savings
60 seconds, no sign-up: enter your monthly bill and roof area, get an indicative system size, cost and payback.